<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>超链接标签</title>
</head>
<body>
    <h4>1.外部链接</h4>
    <a href="http://www.baidu.com" target="_blank">百度</a>
    target打开窗口的方式  _self当前窗口打开  _blank 新窗口打开
</body>
</html>